Means for arresting dust and fluff from machines or appliances for cutting paper andother fibrous materials



Jan. 1, 1935. T GROZlER r 1,986,726 MEANS FOR ARRESTING DUST AND FLUFFFROM MAGHTNES on APPLIANCES FOR CUTTING PAPER AND OF ER FIBROUSMATERIALS A Filed Feb. 7, 1933 3 Sheets-Sheet 1 1,986,726 ANCES 3Sheets-Sheet 2 TERIALS FLUFF FROM MACHINES OR APPLI AND OTHER FIBROUS MAT. H. GROZIER ND Filed Feb. '7, 1933 In n FOR CUTTING PAPER Jan. 1,1935.

MEANS FOR ARRESTING DUST A 1,986, 726 ANCES 3 Sheets-Sheet 3 Hep/4 272ey wvfirvd/Q ERIALS T. H. GROZIER ND FLUFF FROM MACHINES OR APPLI FiledFeb. 7, 1933 FOR CUTTING PAPER AND OTHER FIBROUS MAT Jan. 1, 1935.

MEANS FOR ARRESTING DUST A pers, cardboard, cloth,flleather, woorelatively light and fibrous materials teem mmsrolnimsmewnus Am e-Um I i1 FROM MA H N SO =,APP IAN E I B:- CUTTINGoPAIERAND QTEIEB EIBBOUS t hThomas Hamilton "Grozier; Greenwich Point;

Sydney, ;New South Wales, Australia Armani. Fetrua'rymi 19st;is alinol$655,635 In AustraIiaLMarch3,193 j '1 0=Claims. 1l(

1 This invention relates to improved niansflior arresting and collectingdust, fiufl andloth'er f nely divided or cut particles ior nedllby'sawing cutting'or slitting newsprint or .p h'

Machines employed for cutting, slit uch particles float about in theatniosphere and settle slowly upon machinery, manufactured stockfm Y-riI terialsand otherobjects inthe'vicinity or theme? 4 chines, therebynecessitating ;1eari n g;,a; q? e;-.f moval of thezprecipitatedfine dustorpa'rticles atl comparatively frequentintervals;, Moreover; thelair-borne dust, and other finely out or, divided par-1'1 ticles areinhaled by' persons operating thema chines or engaged intheirvicinitmand such ,p erf sons in course of time have theirhealthan'dphysij-Q weal fitness impaired not seriously affected thereby. l M 1r V In order to oyeroonie'the disadvantages attend ing the operation ofhigh speedlcutting machines in working fibrous materials of the referredY togthere has ,been; proposed an :extenjsiye inde i 1 pendently drivendust exhausting plant, which is.

connected by conduits to the said eutting chines of a factoryinstallation, Such a dustjex ;efljcientinmanyoases; 3 invention 151C;pro de} simple means. or comparatively small cost for? ark restingandcollecting dust and finely comii inntcd v hau'sting'plant with thenecessary;conduitSQfit tings andprime mover (or plurality thereof) is vof high initial cost andis also expensive in dpei arm and maintenancewhile beingjrel'atiyely An object of the present particles which rendernnegessary t nstallation of suchextensiveiandhigh-pri d ust-ex:

hausing plant in a factory wherein rfriac es-are used for cutting,-sawing, w nger; otherwise expensive working fibrous materials. I Y iAnotherobject of thel inventionisto'p vide simple and mexpensive dustarresting andcollect; ingmeans which are capableof operating at lesscost and at higher efficiencies thanthe largegland dust-exhausting Plans .-hit .1e 1

for dust removal purposes A further object of the present inventionresides in the provision of simple-and ineiipensive means which are da td ar e t:andiofillnzmmm h .l in a wi or otherwise working suchrelatively light} and fibrous materials generally cperawaewmp Mtivelyhigh speed with the result meanest and; rfiufif, 1 shortly cuthairs and other smalljparticles are thrown bytherapidlymoving cutt toolswith considerablevelocityiinto the" surr i U air., Owing to theirlightness and small s he dust l' ffi d rsma nn ensdiet t n of m tterat-their points of; origin;or-.generation and as fast as they arefbrmedso thatlthey'lcane 1?. row i t h s h eufi il q h i mechanism bythe high-speed cutting toolsn E ano er bi ct i the i veet'e W P videsimple ,andyinexpensive means whichxlare' adapted to arrest,segregateand collect dust, flu'if;

shortly c'ut'hairs, and other finely cut, comininuted orpillyeriaedlparticlesonportions of materials having a commercial Valuewith high collelctiveefliciencyi 1 i A still further object bfiiiy minorra de ltber rov s n 93 111 43 nd; in xpens e mea s for "arresting,segregating anac011e'ce 'gsma1 particles or; zwortions 9 f light fibrousmaterials whichnieans, aregespecially adapted for. applica tion to anduse withhewspap'er animaga zine Prin ing mach nes, "pa e t n ,mfl h e gla i circular saws of pqrtame'andio'r stationa fybcnch In'operat" g highipe ed lrg'tarylweb printin achine ilzx thr m -ki st rmi e i o s 1 we Iqg hQ: e e i n r r u fl f and minute particles'at the web slitters, orpaper cut? ting tools; ,Such dust; and, fiufl are responsible forgeneral uncleanliness im over, and around the said: printing machines.conditionL-resu ltst in; more; or -less frequent. cleansings; and/or wah-u s? o a o t ste ot pe-pla es: ink-- ing cylinders, and'rollersbecoming filled and/or m her dwwith' n vide r m ts r an precipitatedparticles of paper. otherwisenit is refie cted in inferior printing,more especially in connection y -with "halftone illustrations and thelike pictorial matterrwhich occupy, today, a po- 'sition of primelimportance newspapers, pe-

Ti QiQQ Q Q g g fifi: 3 1 me -0f mv i r si eat n qni e wh le 91 534 l tpllf mi f paper-dust or fiuff is definitelyarrested at its point .0 mini9 o i n a fter r mm diately-segregated and icollecteds Furthermore,

mydevices become and/or form an integral por ti tionor component oi arotary webprinting machine orlthelikemechanism}orrappliance. -;r-

In accomplishing the, above mentioned objects of the invenbii aircirculating it means are moun ed: n: a -o r ted b a m c d for cutting,sawing, slitting or otherwise working light fibrous materials, :any ofwhich operations dust, fiuff,-or other small particles orj por+ tions oi-matter. are formed; less or greater quantity- The-air circulating meansare" adapted to suctionally draw air-into and through an:-

wiing siti ee n theq mme a e nsti ct-M ity of the cutting tools.

2, 3 I A strong air current is induced into the arresting means by saidair- ,circulating means, and the air in passing through the arrestingmeans becomes charged with dust or other-small-lpertionsmr particles--of material.

The dust laden airflis rsuctionally drawn mm pelled by theair-circulating means through a dust extracting and collecting chamberposie tioned on or near the machine an arating means whereby tf tion ofthe dust or other particles therefrom, is dischargedat desired locationsinto uthe-atmosein phere. I

Theair-circulating means may be positioned. either adjacently to orapart"from'the' -cutting? U a meder 'anjalternative form of tion"applied 't'o 'arotary" web-printing.

: ven

I fa 'transverse sectiontaken on' the ure 8 is a side elevationdetailing the slitter f QES HDWni Ht recess: htelevation-detailingtheslitshaft 'f-ans" casing t and suction tube I Figure 1o sideelevationofafurtherdetail Figure lfl 'is aside elevation of a modification of emention-"as applied to machines usedin 12 of Fig. 11.

detail? (if-Fig, "1 1 on" alarge'r scale.

, figure- 1% is a} sectional elevation of the inventioasappliedtofa';stationarycircularsawloench. "Figure I5" isectional' viewtakenonline W articularly to Figures 1to'5 of these drawings, lyindicates a web roller of a pri ting fl re'ss 'having.fformedtherein aslot 2 which co -operates 'withfl arotary" cutting blade or slitterid-sever a-wehof'paper as-it-passes arcane th p ipheryo therol l er' 1'7 Adjustably 'mouii-ted ih adust-arresting casing oi bbx i is a rod 5,the extremity of which projects int the s1ot2 =anu is shaped to 'formacleaning b'l'a "'6 adapted to'dislodge'from saidsl'ot dust and i fineparticles formed" in cutting the paper wee' w (sei-l 'igr4 The arrestingbox 4' is positioned closely to; butiout of 5 contact with, the rollsthere" being anarrow opening or clearance space 7 between'saidbox androller.

The arresting box may be mounted upon a tube 8 which may be square insection and conveniently substituted for the solid square barcustomarily provided on certain printing machines, or alternatively,suchtube maylbe .of any suitably shaped section. -and -in.the formi ofan addition thereto. The top and side of the portion ofs the tube 8within the arresting box 4 are 'removed to afiord free communicationbetween p said bm and tube, see- Figures 4 and 5.

The-square tuberfi is provided with holes 9',

' someofwhichare'made in the lower side of the portion ofthe tubewithinthe arresting box 4 and are icoveredibyigauze or mesh 10, whileothersiofiisaidlholes are formed in said tube adjawhich is :"mounted ona spindle 16 and is rotatedat highspeed' -by-gears 17 and 18, the lattergear being conveniently fixed to the shaft 19- of another web 'rollerr2oof the printing press. said roller may be drivenby the paper-web or;alternatively; by connected gearing.

"The tubular connection 14 is attached to the" casingl3' soasflto bedisposed'in co-axial alignmentwithithefan spindle 16, see Fig. 3,and'said connectioniorms" the suction inlet to the-fan 15';

The connection :14 communicates with the atmos-l-i ph'ei'efby wayof: thedust-extracting chamber 12,;tubularextension 11, square tube 8, holes 9andnarrow opening Z, so that when the fan 15 is in. oper ijoni a' strongcurrent of; air will' be drawn 'jinwardly"through the narrow opening; 7

and the1holes9 .situated-both'vrithin and without the" box 41;"Thexairthen passes through the tube";8,.'tul$ular' extension 11,dust-extracting: chambenlziand tubular connection 14 into thecasing'il3'fi'om' which it is ejected by the fan through" an outleti21'in; said easing into the atmosphere; 7 v v The operation of my'inventionis as follower- When paper is being severed by the co-operation: of' theslitter 3" and the slotv 2; dust and minutescraps'ofipaper areliberatedin the arrestin}; boxe and are carried by the strong current or air,induced by th'efan .15 through the tube 8 andflextension" 11 intotheextracting. and collcting' chamber 12'. This chamberis' provided withone or more partitions .22 having therein perforations 23 covered byfine mesh or gauze 24 through which the dust-laden air passes--seieJFig;[3.. Thedust and minute particles of paper are extracted by themesh or gauze 24' and are deposited within the chamber 12 fromwhich'ith'ey are removed, as and. when required, through a suitableopening 25 upon removal. or manipulation of a cover ,26' therefromj cThe airv ait'er passing through the mesh or gauze 24' isjfre'e' of dustand fine particles, andit is discharged back into the atmosphere throughthe'outlet 21 of the'fan-casing 13. Inythis manner, dust and smallparticles of materials, geni'i ttention being directed moreparticiilarly to bh SlittBI 3 and fans 15a,:instead of being spaced{apart and. independently operated are encased in c a housing 27 andfixed upon a press driven 'slittershaft' 28] rotatably mounted in saidhousing. fIhe slittr 3 is preferably mounted between the fans 15 and"15a in a centrallposition, and said "fans are provided withblades 29:which may be positioned on opposite sides of the slitter- 3 'in staggered relationship" as shown in Fig; 10, or in: any

other preferred mannerr I l i The casing 27, which maybe. madeiintwo'parts,

see Figi fil is positionedc closely to, but out of Contact: with, the-web-rollei" asshown in Fig. 7. I'he saidcasing is provided with walls3ohaving 1 air ports 30a and 30b formed j-therein, and

tl'ie' slitter 3 projects througha-narrow slot 31- formed in the said'walls.- 1 i i 'Aitub 32 is connected- -toj the casing 27 in coaxialalignment with tfie slitter shaft 28; and said tube is connected'with anextracting and collecting:='chamber 12 constructed "as previously" described; w The chamber-J 12 is: connected tof the andfcleaning rod'5hereinbefore described. Additi'o'nal' air holes -9 square tube 8 whichcarries an arresting' box 4 and blade 6 constructed as may befp'rovidedinttheup'per partsof theends 1 throughthe arrestingbox 4, tube 8,extracting'and collecting chamber' 12 and tube 32into thecasin'gexpelled through an'outlet' 33 into'the atmosphere. In itspassagethrough; the arresting box 4;theair becomes charged with dust andminute particles of 'paper which are segregated and deposited'in thechamber 12- so that the air enters the casing 27 free of dust; Insteadof the extracting and collecting chamber 12 being positioned between thearrestingbox and the casing 27; said chamber having an outlet 21 may beattached to the outlet 33, and vtl'ie tube '3 maybe connected to thetube 32 by a bent pipe or conduit"'34,ias shown by chain-dotted lines inFig 6. The f an :l5a, which also: rotates with the slitter3 and f an 15,operates directlyiuponthe said:slitter 3' and that section of the webroller "1' surrounded by the "casing 27,

is -Reference bein rollerlis thereby arrested,extracted:andcollectedin-saidchambermp; i

had to timetidied-13 the drawings, 35 indicates a circular saw such asisused inmachinesfor cutting paperiwebs 01' sheets, cardboard or otherfibrous materials; The

saidicircular saw-35jis fixed upon a spindle 36 of a direct coupledelectric motor. 3'7, "or saidsaw'may t casing. x-Mounted' on:oppositesides of the-sawg35 are blades m of fans 41 anddla. suctioninlet 42', (preferably having enveloping air passage 43 isfformed in thecasing 38, while air' inlets 42a arealso'providedinthe electric-motor,so thatiair may' pass through saidsmoto'r into the interior of a.

saidlcasir ig 38a The casing'38 is provid'ed with'a.

substantially" tangential tapered I outlet w 44; to

which is :connected a flexible tube 45 attached 'to describedms w a a iq.

The casing 38, saw35'sandqelectric motor 3'7 (forminga portablesawequipment) may be suspended in the manner usual in paper web or sheetcuttingl machines and/ or the like appliances" as for example; by rods46 whichdepend from trolleys'l mounted on a rail .48supported in anelevated position 'by standards 49.. it i fln operationythehousing 38 isoved along a laminated plurality of paper-websW tori like fibrousmaterials,ythe saw 1 35 being: driven bythe electricmotor 3'1 andcuttingthe paper-webs Was it -travels. wDust formed byzthe saw 35 incuttingthe: paper is drawn upwardly by the saw te th into the casing 38 andcentriiugallyicollected by the air currents generated by the fans 41-and 41a, which preferably {pass through the enveloping air passage 43and inlets 42 and 42a iinto the'casingi 38.

The dust-laden air is impelled from the casing38 through the tube 45'and the dust extracting and collecting chamber 12, irom which thedust-freed air escapes back into the atmosphere through an opening or0utlet.:21 formed at; any approved location therein; a; j 1} 1 InFigures 14 and 15 ofthe drawings, 50 indicatesthe table ofa,stationarysaw-bench having therein anarrowslot51 through whichprojects an extracting and collecting chamber 12 having arr airi outlet21 and constructed :ashereinbefore a circular saw 52. v, Thesaw 52 isenclosed within a casing 53 secured tdtheundersideofthe sawbench table50 and is fixed upon a spindle 54 mounted upon} outside bearings 55.Suitably mountednponopposite sides of the saw- 52 are fans 56 and-57,the .latter ian being enclosed within anlinner casing 58. r The casing53,has air inlets 59 and 60'formedin the sides thereof, whilst the innercasing is also provided with an air inlet 61,;preferably in alignmentwith the. inlet 59 formed in thewall of theflcasing 53. The :air ;inlet60 comprises an adjustable extendsinto'the casing'153 as showninFigure15. If desired", an adjustable flanged tube 62amay be readilyinserted within the;in1et-59; as) shown in chain-dotted lines; Thefcasing 53 is provided with a tangentially disposed tapered tubularout-n 1et63, within which is a extension of the inner: casing 58; v Tothe undenside of the: table 50 there may be fixed a lining 65 of felt orlike material which is positioned closely to, butout of contact with;the saw 52 so that, dust and fluff may. bespreventednfrom' passing outthrough the: slot 51,2andthe top flanges of the nozzle 64 ,forming an 56sets 1 up it'urbulence within thecasing '1 53 and causes whirling of thedust andflufi therein while the-fan 57 draws the dust; and fluftchargedair throughqithe inlet 61 into the inner casing 58. The dust andfiuffcharged air is -exp elled by the fan 5'7 throughthe nozzle- 64 into thetapered tubular outlet 53 in which the strong jet of air escapingiromsaid nozzle sets up evacuative action-:andcauses alowering of thepressure within the casing 1.53. The; fall; of pressu e w h n t e liOi Iportions having a commercial casimgfiuacauses air: topassdownwardlythrough the-slot 51: and; through: the :clearance'cspacebetween the saw ,;52 and r the felt lining :.65,,: the downwardly:movingr air carrying. itzthe dust and fiufi: formed by the; saw 52:intoutlre;casing 5.3, from which saididust'and fiu'fi are ejected-w bythe fan 51" themanner-above; described.v nThe taperedtubular outlet =63:may be connected to a dustaextracting: and collectmgchamber .12constructed as hereinbefore described so. that; the air may be freed ofdust and fluii before .being: re'- turned to the atmosphere.

In some cases: thednne'r' housing 58 maybe modified in shape iasshownbydotted lines in Figure 14,- so that the nozzle 64 may be directedtowards. the teeth'of" the: saw 52 to remove therefrom adheringparticles of dust-and fluff of more or less clinging or'adhesive'nature,

' The improved-'means for arresting and collecting dust and other'fi'nely divided particles or shortly cut portions-of matter'described,is of simple construction and can be applied with equal facility torotary web-printing presses, paper cutting and similar'm-achines duringtheir construction, orto existing machines previously installed and nowin use. "Moreover, the invention is comparatively inexpensive and itwill befound highlysati'siactoryjfor maintaining air 'in the precinctsof a machine ormachinesoperating on fibrous materials in a hygienicstate; for keeping said mach-inery'in a clean and efficiently operativecondition andalso 'for conveniently and reliably collecting finelydivided particles or shortly cut value. WhatI'd'o claim-is q 7 I.Associated-with high speed rotaryweb printing machinesembQd'ying-papercutting mecha- I-iism which "produces cutter-generatedfibrous dust, 'fiufi, or particleso'f comminuted matter; means'forarresting suchcutter-generated fibrous matter comprising, adust-arresting box for handling dust dispersed-by the cutting'mechanism,air inlets inthediast-arrestingbox, a dust-extracting and collectingchamber, a conduit connecting *thedust-arresting box and thedustextracting and collecting chamber, air holes in the conduit and an'enclosed fanning means for gathering dust particles-as they are formedby the cutting mechanism and connected with the dust-extracting and]collecting chamber and adaptedto induce air throughithe air holes'andinlets and set up 'an air current through said dust-arresting box andsaid duste'extracti'ng and collecting chamberh r a Associated with highspeed mechanism, whereby-a continuous .web: orsheet of paper or fibrousmaterial issevered by the co-acting of a sl'itter with the peripheralslot of a roller inmanner to produce cutteregenerated fibrous dust,fluff, or particles, of comminuted matter; means for" arresting "suchcutter-generated "fibrous matter comprising, a dust-arresting box, aclear-- ing blade mounted in the dust-arresting box and adjustablyextended into the peripheral slot, fans mounted to rotate with thes'litter, a" casing ad'- jacent" to the peripheral slot enclosing 'the'fans and the s'litter and positioned closely to but out of contact withthe roller, air ports in the casing close to the roller,- a suctioninlet in the casing, an outlet on the casing, and a dust-extractingandcollectingchamber located between the dustarresting box'an'd thesuctioninlet, or attached to the said outlet.

3. Associated with high 'speed" mechanism wherebya continuous'web orsheet of paper or for arresting such cutter-generated fibrous matter.

comprising, a dust-arresting box for handling dust dispersed by thecutting mechanism, a dustextracting and collecting chamber, air holesand inlets in the dust-arresting box, a conduitcom nectingsaiddust-arresting boxand said dusteextracting. and collecting,chambenair: holes in-the conduits, and a fan enclosed ina separatecasing for collectingv dust particlesdi-rectly when formed by thecutting mechanism connectedwith the dust-extracting chamberand. adaptedto induce air through the air holes and inlets and set up anpair'current through the said dust-arresting box. and said-dust-extractingand collecting chamber. ,4. In means for' arresting and collecting zdust formedin the cutting or slitting of paper-webs or sheets or otherfibrous materials, dust-arresting meanscomprising, a dust-arresting boxshaped to partially, ouerl-ie the peripheral surface :of a slittingrollerandspacedclosely to but OHtuDf contactwith. said roller,aperipheral slot in the rollenpa clearing blade mounted'in the dust,-arresting box and adjustably extendedinto the peripheral slot, airinlets in'the-dust-arresting.box, and a suction conduit connected to andsupport ing the dust-arresting box, said suction conduit being-adaptedtodraw dust and air into-said dust-arresting box-and-to conductdust-charged airfromthe same.

, 5,. In machines used in cutting paper, cardboard or other fibrousmaterials, embodying: a suitable electricmotor and a cutting elementoperated thereby; meansz'for arresting and collecting dust, fluff,andiminute particles formed bythe cutting element comprising, a casingenclosingtheicutting element, a slot. for the cutting element in thebase of the casing, fan blades mounte'd onboth sides of the cuttingelement, an air' inlet; maths easing, an air inlet through thevcasingrofthe electric motor, a substantially tangential tapered outlet :onthecasing, a. dust-extracting and. collecting. chamber, a, flexible 1'tube connecting the taperedfoutletof saidcasing withithe said chamber,and-an air outlet on the. dust-extracting and collecting chamber.

6. In machines used in cutting paper, cardboard or other fibrousmaterials, embodying arsuitable electrictmotor and a cuttingelementioperated thereby, means for centrifugally arresting andcollecting dust, fluff, and minute particles formed by the cuttingelementasclaimed inclaim: 5, wherein an enveloping air-passage surroundsan air' inlet of the cutting element casing for the purpose ofsuctionally arresting and collecting-from the adjacent atmosphere'anyescaping-minute particles of dust and/0r fluii'. I V 7, In apapercutting mechanism for association with high speed rotary webprinting machines,v a slotted casing, a rotary cutter projecting throughthe slotted casing; means for arresting and collecting dust and minuteparticles of fibrous materials formed by the cuttingelement including-asubstantially tangential tapered outlet on the casing, an inlet on eachside ofsthe casing, fans'on opposite sides of the cutter, an innerhousing enclosing one of therfans, .a tangentially disposed wherein thetangentially disposed nozzle of the inner housing is located in thetapered outlet of the outer casing for the purpose of setting up'evacuative action and lowering the pressure within saidtcasingh 9. Anarrangement as claimed in claim '7,

10. An arrangement as claimed in claim '7,

whereinthe fan in the inner housing draws dustcharged air into thehousing and discharges the air through the tangentially disposed nozzleto lower the pressure in the casing, and wherein the other fan sets upair turbulence and whirling of the dust particles in said casing.

THOMAS HAMHVITON GROZIER.

